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Thank you, I was brave enough to do it, and now we have heating on. You all are so friendly. I do not forget this.

Before opening the valves, I just want to ensure that they are the right ones: "cold main input" and "heating return". And I should open them at the same time, for some seconds? Thank you again.

I have Alpha CB24/28 boiler. For 2 day we have had no heating, no hot water and indicator neons A and B are flashing on and off alternatively, which means by fault finding instruction leaflet - low pressure. If system pressure is low repressurisation is required. But how to do it. I found under...